Question

A pollen grain is best defined as a ______.

Options

• male gamete

• microspore mother cell

• partially developed male gametophyte

• partially developed embryo

Answer 1

A pollen grain is best defined as a partially developed male gametophyte.

Explanation:

A pollen grain is the male gametophyte in an angiosperm, but it is in a partially developed stage. It contains two cells, a larger vegetative cell and a smaller generative cell. The generative cell will divide to form two male gametes (sperm cells), completing the development of the male gametophyte after pollination. Thus, the pollen grain is not a male gamete itself but a structure that will give rise to male gametes. This aligns with the definition of a partially developed male gametophyte.